Good question, I know you can create a json file with your pubkey on a your website and verify that way, but Alby was easier.
But that'd be a great addition to Alby's Bitcoin Lightning Publisher for WordPress π€ It already makes it easy to add v4v tags to your rss and page code without getting too technical, I'm sure some tech wizard there could make NIP-05 verification for anybody with a WordPress site and their own domain simple. They have a lot on their plate though π